Method and apparatus of a self-aligning sleeve for the correctio

Details Method and apparatus of a self-aligning sleeve for the correctio Method and apparatus of a self-aligning sleeve for the correctio

1984-07-20

1986-11-18

Leppink, James A.

Boring or penetrating the earth

Means traveling with tool to constrain tool to bore along...

Axially spaced opposed bore wall engaging guides

175325, E21B 710

Patent

active

046230262

ABSTRACT:
A method and apparatus for correcting the direction of a deviated borehole having a self-aligning sleeve slideable over flexible members of the drill string assembly, which is non-rotating and substantially the same length as a flexible member of the drill string assembly, having two elliptical protrusions. There further is included a first protrusion means for centering and stabilizing the tool in the borehole. Also, a second pad-like protrusion means is included for guiding the drill bit and drill string assembly in the desired direction.

REFERENCES:
patent: 2712434 (1955-07-01), Giles et al.
patent: 3156310 (1964-11-01), Frisby
patent: 4185704 (1980-01-01), Nixon, Jr.
patent: 4465147 (1984-08-01), Feenstra et al.
patent: 4501336 (1985-02-01), Kemp et al.
"Drilco Develops Tool to Steer Bits", Article; The Oil and Gas Journal; Sep. 28, 1964; p. 49.

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